persamaan kuadrat x^2+(a-1)X-3=0 akar p dan q,jika 2p/q=p-2,maka a=

jawb

p + q = -(a -1) = 1 - a
p q = - 3

2p/q = p - 2

2p = q(p -2)
2p = pq - 2q
pq = 2p + 2q
pq = 2(p+q)
-3 = 2(1-a)
1 - a = - 2/3
a = 1 + 2/3
a =  5/3